Armature-winding for induction-motors.



Patented Aug. 12, 1902.

A. H. ARMSTRONG. AHMQTURE WlNDlNG FUR XNDUCTIDN MOTORS Applicntlon filed Nov. 3. 189T.\

(no'inomm FIAQAQQ W 2 F I v MM Inventor. Albert, HArmsCrong.

WiCnesses.

UNITED STATES.

PAT NT OFFICE.-

{ALB-FIRTH. ARMSTRONG, onson'nnncrsny, NEW YORK, Assronon To run GENERAL ELEQTRIO COMPANY, A. CORPORATION'OF NEW YORIL- IARMATURE-WIND'ING For: INDUCTION-MOTORS].

'srnorrxcn'rron forming M of Letters Patent No. 7oc,soa, dated August 12,, 1902. Lpplication filed November 3. 1897. Serial No. 857.229. (Nomocleld 1'0 all whom it may concern.- Be it known-thatLALBERrH. ARMSTRONG, citizen of the United States, residing at -'Schenectady, in the countyof Schenectady, =5 Stateof flewYorlr, have invented certain new and useful Im provcment's in Armature-Windin 'gs fiorlnd-uction-Motors, (Case No. 490,) of which the following is a specification. In certain kinds ofl induction-motors sqnir 'l'o rel-cage armatnresare employed, comprising a number of copper bars extending parallel withthe shaft and soldered to rings at each and, which connect thorn in closed cir'cnit re lation; The heating 'of such an armature is J5 limited to'the melting-point of the-solder used in'it's construction. My invention has for its objects to decrease the labor of construction and. to provide an armature. in which no solder is used and which will stand overheating-up to the melting-point'of copper without heingdestroycd. In the accompanying drawings, Figure 1 is a sectional view of one forrp of my improved armature. Fig. 2 is a partial side elevation z'5 of the same; and Fig. 3 is-a perspective of an armature of the type shown in Fig. 1, showing the method of assembling the laminae.

Mounted-on shaft A is .a spider l3, comprising 8,1111) and'a number of radial arms connected at their outer end to a cylinder 0,

' whichforms a support for laminae D. Formed integral with and at rightanglcs to cylinder C is a flange O. The conductors F-extcnd parallel to shaft A and are connected at their opposite. 'ends by rings cast or otherwise formed integral with the conductors instead ,of soldering or riveting the conductors to the rings, as has heretofore been done.- I One method. of constructing the armature 40 is to prepare a mold in the usual manner and place conductors F in a circle at suitable intervals in the sand. The molten metal form.- ing the spider and end ring (3', Fig. 1, is then poured into the mold, which securely welds the conductors to flange 0. It is preferable that the conductors F be separately formed of drawn cop r on account of its conductivity. In this case ring F is a casting and may be cast around the conductors at the same time as the spiders and end ring 0. The outer periphery of cylinder 0 is then turned true-and the toothed laminated punchare deep'cnongh to receive conductors. F.

After the proper number of laminae have .60 been assembled end ringG is mounted in 'position and clamping-ring E employed to re-- tain the end ring and lamina: in place. No insulation has been shown on theconductoi's; but they may be insulated, ifdesired. .6 5

With the construction described it will be seen that the conductors are welded to flange czar one end andto ring F at the other and that no solder is employed. The joint thus formed between the conductors andfend rings is for all practical purposes the equivalent'of making the conductors -and end rings of a single casting. .At the same time the increased conductivity of the drawn copper is obtained. 5 I

A modification of the construction disclosed herein constitutes the subject-matter of my application,,-"Serial No. 43,615, filed January. 17; 1 901, as a division of this application.

' By the construction above described I amSoenabled to dispense with the binding-bands, commonly employed, and the labor of assembling is greatly decreased.

What I claim as new, and desire to secure by Letters Patent of the United States, is- 1. In cornbination, a' plurality of conductors of drawn metal, and end connections formed integral therewith uniting said conformed conductors mounted in the laminaeslots, and an end ring formed integral with the conductors.

4. In an induction-motor, the combination of a body of toothed laminar, a support theretoo for,copperconductors mounted in the laminaeslots, and end rings uniting the copper con-' 'dnctors. in closed-circuit relation, termed. by, casting metal around thej conduetbrszf'i .p

5. In a closed-circuitqd armature, the 0on1- bination [of a cast-metal spider, anen'd flange 5 formed integral therewith ,eopper'bars formed integral with the flangewhich unites them in closed-circuit 'relstion; and .a ring at the 0pposite end of the armature; also formed in- I tegral with said bars;- 4 4 tion.- a cast-metal'spider, an end flenge-therefor, copper bars formed .integral with the.

flange which unites them in. elosed-eircnited' relation, and a short-circuiting ring uniting 1 t5 the opposite ends of the said bars.

. -7.- In a closedscircnitermature, the combi- 6. Ina closed-circuitarmeturefincembinanation ef a east-metal spidenan end flange formed integral therewith, a'body of toothed laminze, a clampingring for holding this laminae against the Henge, copperbars formed no integral with the flange which unites them in c10sed-cirenitrelation, and a ring at the op,- posite end of the armature also. formed intagrally withthe conductors, so ar-ranged that the laminae can be assembled by slipping as. them inside the ring. x h

In witness whereof I have hereunto set my hand this 1st day of November, 1897.

ALBERT H. ARMSTRONG. Witnesses: 

